Spine
-
A retrospective cohort study from 2011 to 2014 was performed using the American College of Surgeons National Surgical Quality Improvement Program database. ⋯ 3.
-
Multicenter retrospective study. ⋯ 4.
-
Retrospective comparative study. ⋯ 3.
-
Cross-cultural adaptation and cross-sectional psychometric testing in a convenience sample of patients with neck pain. ⋯ 3.